Cal. Lab. Code § 7300.4

This chapter does not apply to work that is not related to standards for conveyances that are (a) incorporated in codes promulgated by the American National Standards Institute or the American Society of Mechanical Engineers or (b) included in regulations of the division, in effect immediately prior to January 1, 2003, prescribing conveyance safety orders. Work exempted pursuant to this section includes, but is not limited to, routine nonmechanical maintenance, such as cleaning panels and changing light fixtures.